Sonos Ace wireless Headphones - White

I ordered the "good condition" headphones in the belief that there might be signs of use but that they would work and be intact. As soon as I received the headphones I noticed that one of the buttons (which adjusts the noise cancellation) was not working. I am very disappointed as these were headphones for over 400€. I also had to clean the inside of the ear pads (removable) of the headphones the first time because they were full of sand?? Also, the headphones were missing a cable pocket and the travel case was very dirty on the outside which I tried to clean. All in all I am very disappointed, I thought the quality control would have been much better. I expected more. At least the headphones could be returned free of charge.